Second, some professors just throw the tests down the stairwell and give those that land on the top steps an A, middle steps a B, etc. The legal term for this is Stairy Decisis ..
In addition, professors conspire with administration to distribute grades ... they will look into the students undergrad school (the more prestigious the undergrad school the higher the grade) the LSAT score and other indicias of "smartness," such as your parent's income, occupation (if one of your parents is a lawyer you've definitely an edge). Blacks, Latinos and other minorities are usually C-ed, boys are almost always given higher grades (a fraction) just for being boys .. and so on, you get the point ..
On the other hand, if you do a really good job, they can not downgrade by more than one letter ... that is to say, if you write a stellar exam after being loaded with drugs for an entire week and your exam is absolutely the best A+, the most they can do is downgrade you to something like B+ -- they won't go that far as to give you a B- (or even B for that matter)! Please note, though, that it takes a hell of a lot of work and effort in law school to write a stellar exam to be absolutely the best! Remember that as much as half of your classmates are probably on something on the day of the exam (especially at cutthroat schools) so to get an edge you'll have to be on something EVERY SINGLE DAY of your exams time period to actually increase your assimilation capacity (and probably jack up your IQ too!) For instance, it's pretty much a well-known fact that many students randomly use, say, 3X30 mg tablets of Adderall everyday during the exam period and 2-3 coke blowns on the day of the exam!